Unfortunately, it's wait and see until the results of the biopsy are in, which is not an easy process to deal with. It could be as you think or any number of things, and hopefully is something minor, is treatable. Many here, including myself, had recurrences, I had 7, and was successfully treated for them. These days there are all types of treatments, including immunotherapy, surgical approaches, and radiation, including reirridation, so have hope in that if it's needed. You may want to occupy your time, exercise, read, a hobby or anything else that may help you.

Good luck with everything.